its really the weighted average part and after im struggling with

Required information The following information applies to the questions displayed below] Warnenwoods Company uses a perpetual inventory system. It entered into the following purchases and sales fransactions for March. 3. Compute the cost assigned to ending inventory using (a) FFO, (B) LIFO, (c) weighted average, and (d) specific identification For specific identification, the March 9 sale consisted of 80 units from beginning inventory and 340 units from the March 5 purchase; the March 29 sale consisted of 40 units from the March 18 purchase and 120 units from the March 25 purchase. Complete this question by entering your answers in the tabs below